<template>
  <el-menu class="el-menu-vertical-demo" @open="handleOpen" @close="handleClose" :collapse="isCollapse" background-color="#545c64" text-color="#fff" active-text-color="#ffd04b">
    <h4 class="title" id="title">{{ isCollapse ? '后台' : '通用后台管理系统' }}</h4>
    <el-menu-item v-for="item in noChildren" :key="item.path" :index="item.path" @click="clickMenu(item)">
      <i :class="`el-icon-${item.icon}`"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChildren" :key="item.label" :index="item.label">
      <template slot="title">
        <i :class="`el-icon-${item.icon}`"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group>
        <el-menu-item v-for="children in item.children" :key="children.path" :index="children.path" @click="clickMenu(children)">{{ children.label }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<script>
  export default {
    name: 'CommonAside',
    data() {
      return {
        serverData: [
          {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home'
          },
          {
            path: '/mall',
            name: 'mall',
            label: '商品管理',
            icon: 'video-play',
            url: 'MallManage/MallManage'
          },
          {
            path: '/user',
            name: 'user',
            label: '用户管理',
            icon: 'user',
            url: 'UserManage/UserManage'
          },
          {
            label: '其他',
            icon: 'location',
            children: [
              {
                path: '/page1',
                name: 'page1',
                label: '页面1',
                icon: 'setting',
                url: 'Other/PageOne'
              },
              {
                path: '/page2',
                name: 'page2',
                label: '页面2',
                icon: 'setting',
                url: 'Other/PageTwo'
              }
            ]
          }
        ]
      };
    },
    methods: {
      handleOpen(key, keyPath) {
        key; //防未调用报错
        keyPath; //防未调用报错
      },
      handleClose(key, keyPath) {
        key; //防未调用报错
        keyPath; //防未调用报错
      },
      clickMenu(item) {
        this.$router.push({
          name: item.name
        }).catch(err => {console.log('error:', err)});
        this.$store.commit('selectMenu', item);
      }
    },
    // watch: {
    //   isCollapse(val) {
    //     let tit = document.getElementById('title');
    //     if(!val){
    //       tit.innerText = '通用后台管理系统';
    //     } else {
    //       tit.innerText = '后台';
    //     }
    //   }
    // },
    computed: {
      noChildren() {
        return this.serverData.filter(item => !item.children);
      },
      hasChildren() {
        return this.serverData.filter(item => item.children);
      },
      isCollapse() {
        return this.$store.state.tab.isCollapse;
      }
    }
  }
</script>
<style lang="less" scope>
  .el-menu-vertical-demo:not(.el-menu--collapse) {
    width: 200px;
    min-height: 400px;
  }
  .el-menu {
    height: 100%;
    border: none;
  }
  h4 {
    color: #fff;
    text-align: center;
    line-height: 48px;
  }
</style>